Novel Antibody And Use In Diagnosis And Therapy Of Arthropathies

ABSTRACT

The present invention provides a composition comprising an antibody or fragment thereof against oxidised Collagen II (CII) in which the antibody or fragment thereof is conjugated to a pharmaceutically active moiety. The invention also provides a composition comprising an antibody or fragment thereof against oxidised Collagen II (CII) and a detectable label. The invention further provides the use of such compositions in medicine, in particular for the treatment of an arthropathy, and in methods of diagnosis.

The present invention relates to a novel antibody and its use in the diagnosis and therapy of inflammatory diseases of the joints such as rheumatoid arthritis (RA) and osteoarthritis (OA).

INTRODUCTION

The final outcome of most rheumatic conditions, the leading cause of disabilities in the western world, is breakdown of articular cartilage. This breakdown is the final outcome of inflammatory events in both rheumatoid arthritis (RA) and osteoarthritis (OA) mediated by either influx of activated leukocytes (RA) or activated chondrocytes (OA). Pro-inflammatory cytokine blockade such as anti-TNFa and IL-1Ra is therefore currently used to treat arthritic conditions, mainly RA. These treatments however, are not consistently effective and the number of patients that fail anti-TNF therapy is increasing. Especially for anti-TNFa treatment there is a risk of serious infections and malignancies. These systemic side effects could be minimised by the development of technologies to target therapeutic agents specifically to the inflamed tissues, but has so far been impeded by the lack of proper target epitope(s) that would be present uniquely in the diseased joint and not in the healthy joint.

RA is a classic inflammatory form of arthritis, which is a chronic autoimmune disease with extensive synovial inflammation. Influx of activated leukocytes infiltrating the inflamed synovial membrane results in up-regulation of inflammatory cytokines such as TNFa, interleukin-1 (IL-1) and interleukin-6 (IL-6) leading to increase in the levels of matrix metalloproteases (MMP). Moreover, infiltrated inflammatory cells consume increased amounts of oxygen, resulting in the generation of reactive oxidant species (ROS) including superoxide radicals (O₂), hydrogen peroxide (H₂O₂), hydroxyl radicals (OH), hypochlorous acid (HOCl), nitric oxide (NO) and peroxynitrite (ONOO). In addition, sequential oxidative reactions generate reactive oxidants such as advanced glycation end-products (AGE). The combined activities of MMP and ROS may be the cause of the excessive degradation of the extracellular matrix leading to cartilage destruction.

The immuno-pathological events following the ROS reactivity with cartilage specific collagen type II (CII) protein have been studied recently. A substantial increase in binding of RA sera to CII after chemical post-translational modification in vitro by ROS has been demonstrated in comparison to binding to native non-modified CII, which is significantly greater than in non-RA sera. Post-translational modification in the acute and chronic inflammation by ROS has also been postulated by the presence of other ROS damaged proteins and auto-antibodies against other auto-antigens that are post-translationally modified by ROS. Generation of neoantigenic epitopes on modified CII has been reported in Nissim et al Arthritis & Rheumatism, volume 52 (12) pages 3829-3838 (2005)). Antibodies against IgG-AGE and a T cell response against IgG modified by HOCl and peroxynitrite have also been observed.

Although synovial inflammation in OA is not as extensive as in RA and inflammatory cells are not significant in numbers, low grade synovitis is nearly a constant feature in OA. Abnormal mechanical force appears to stimulate chondrocytes to produce the same inflammatory mediators and ROS as the infiltrated leukocytes present in inflamed RA joints leading to post translational modifications of CII. There is a report of elevated levels of nitrated CII peptide in sera of patients with OA. The presence of strong staining of nitrotyrosine and low antioxidative capacity in the degenerative region of OA cartilage compared with the intact region from the same sample suggests a possible correlation between oxidative damage and cartilage degradation. As in RA, indirect involvement of oxidative stress has also been evidenced in OA by the fact that: (i) OA is strongly linked with age and in aged cartilage there is accumulation of AGE; and (ii) there is accumulation of lipid peroxidation product and nitrotyrosine.

There is a need for improved means for diagnosing inflammatory diseases of the joints and for improved therapies for arthropathies such as rheumatoid arthritis (RA) and osteoarthritis (OA).

It has been found that an antibody raised against post-translationally modified Collagen II (CII) can specifically target the antibody to the sites of inflammation in the joints. This degree of specificity is important since native CII may be present in both inflamed and healthy joints also.

According to a first aspect of the invention, there is provided a composition comprising an antibody or fragment thereof against oxidised Collagen II (CII) in which the antibody or fragment thereof is conjugated to a pharmaceutically active moiety.

The present invention therefore provides a novel approach to the targeting of drugs to self-epitopes on Collagen II that are a normal component of the tissue but which become immunogenic after post-translational modification by free radicals as part of a disease process affecting Collagen II.

The antibody may be a polyclonal antibody or a monoclonal antibody. It may be a human or humanized or chimeric antibody with sequences, residues or domains derived from more than one animal species. Fragments of antibodies include Fc, Fab, scFv, single domain (dAb) antibody, diabody, minibody, and scFv-Fc fragments.

In one embodiment of the invention, the antibody comprises CDR sequences in the Variable Heavy (VH) Chains and Variable Light (VL) chains as shown in Table 1. CDRH2 and CDRH3 are in the VH chain and CDRL2 and CDRL3 are in the VL chain.

TABLE 1 CDRH2 CDRH3 CDRL2 CDRL3 DISSTGSYTAYADSVKG GAGSFDY AASALQS QQSSSTPTT (SEQ ID NO: 1) (SEQ ID NO: 39) (SEQ ID NO: 61) (SEQ ID NO: 86) AISAAGTATAYADSVKG GYDTFDY AASSLQS QQNYGYPNT (SEQ ID NO: 2) (SEQ ID NO: 40) (SEQ ID NO: 62) (SEQ ID NO: 87) SISNSGSYTDYADSVKG GYGSFDY AASTLQS QQANSSPDT (SEQ ID NO: 3) (SEQ ID NO: 41) (SEQ ID NO: 63) (SEQ ID NO: 88) SINNYGSNTAYADSVKG GYSSFDY AASYLQS QQTSSSPDT (SEQ ID NO: 4) (SEQ ID NO: 42) (SEQ ID NO: 64) (SEQ ID NO: 89) SINNYGSNTAYADSVKG GYSSFDY AASYLQS QQTSSSPDT (SEQ ID NO: 4) (SEQ ID NO: 42) (SEQ ID NO: 64) (SEQ ID NO: 89) SISYTGNSTDYADSVKG GYTAFDY YASYLQS QQADSTPTT (SEQ ID NO: 5) (SEQ ID NO: 43) (SEQ ID NO: 65) (SEQ ID NO: 90) SISYTGNSTDYADSVKG GYTAFDY YASYLQS QQADSTPTT (SEQ ID NO: 5) (SEQ ID NO: 43) (SEQ ID NO: 65) (SEQ ID NO: 90) SISYTGNSTDYADSVKG GYTAFDY YASYLQS QQADSTPTT (SEQ ID NO: 5) (SEQ ID NO: 43) (SEQ ID NO: 65) (SEQ ID NO: 90) SISYTGNSTDYADSVKG GYTAFDY YASYLQS QQADSTPTT (SEQ ID NO: 5) (SEQ ID NO: 43) (SEQ ID NO: 65) (SEQ ID NO: 90) SISYTGNSTDYASVKG GYTAFDY YASYLQS QQADSTPTT (SEQ ID NO: 5) (SEQ ID NO: 43) (SEQ ID NO: 65) (SEQ ID NO: 90) NIATDGTTTYYADSVKG NSTYFDY SASTLQS QQAATSPTT (SEQ ID NO: 6) (SEQ ID NO: 44) (SEQ ID NO: 66) (SEQ ID NO: 91) SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID NO: 45) (SEQ ID NO: 65) (SEQ ID NO: 92) SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID NO: 45) (SEQ ID NO: 65) (SEQ ID NO: 92) SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID NO: 45) (SEQ ID NO: 65) (SEQ ID NO: 92) SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID NO: 45) (SEQ ID NO: 65) (SEQ ID NO: 92) SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID NO: 45) (SEQ ID NO: 65) (SEQ ID NO: 92) SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID NO: 45) (SEQ ID NO: 65) (SEQ ID NO: 92) SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID NO: 45) (SEQ ID NO: 65) (SEQ ID NO: 92) SISYTGDSTYYADSVKG NYSAFDY YASYLQS QQADSTPTT (SEQ ID NO: 8) (SEQ ID NO: 46) (SEQ ID NO: 65) (SEQ ID NO: 90) SINDSGTTTYYADSVKG NYSAFDY AASDLQS QQSDSAPTT (SEQ ID NO: 9) (SEQ ID NO: 46) (SEQ ID NO: 67) (SEQ ID NO: 93) SIDSAGASTYYADSVKG NYSAFDY NASSLQS QQSDTYPST (SEQ ID NO: 10) (SEQ ID NO: 46) (SEQ ID NO: 68) (SEQ ID NO: 94) SISYTGDSTYYADSVKG NYSAFDY TASNLQS QQSYASPTT (SEQ ID NO: 8) (SEQ ID NO: 46) (SEQ ID NO: 69) (SEQ ID NO: 95) SISYTGDSTYYADSVKG NYSAFDY TASNLQS QQSYASPTT (SEQ ID NO: 8) (SEQ ID NO: 46) (SEQ ID NO: 69) (SEQ ID NO: 95) SISYTGDSTYYADSVKG NYSAFDY TASNLQS QQTGSYPTT (SEQ ID NO: 8) (SEQ ID NO: 46) (SEQ ID NO: 69) (SEQ ID NO: 96) SINATGYGTYYADSVKG NYSDFDY SASALQS QQGDSYPTT (SEQ ID NO: 11) (SEQ ID NO: 47) (SEQ ID NO: 70) (SEQ ID NO: 97) SINSNGTDTYYADSVKG NYSDFDY TASALQS QQGYGAPTT (SEQ ID NO: 12) (SEQ ID NO: 47) (SEQ ID NO: 71) (SEQ ID NO: 98) SISATGSSTYYADSVKG NYSDFDY SASDLQS QQSSYTPTT (SEQ ID NO: 13) (SEQ ID NO: 47) (SEQ ID NO: 72) (SEQ ID NO: 99) SISATGSSTYYADSVKG NYSDFDY SASDLQS QQSSYTPTT (SEQ ID NO: 13) (SEQ ID NO: 47) (SEQ ID NO: 72) (SEQ ID NO: 99) SIDDSGATTYYADSVKG NYSSFDY YASSLQS QQAANYPTT (SEQ ID NO: 14) (SEQ ID NO: 48) (SEQ ID NO: 73) (SEQ ID NO: 100) SIDDSGATTYYADSVKG NYSSFDY YASSLQS QQAANYPTT (SEQ ID NO: 14) (SEQ ID NO: 48) (SEQ ID NO: 73) (SEQ ID NO: 100) SIDDSGATTYYADSVKG NYSSFDY YASSLQS QQAANYPTT (SEQ ID NO: 14) (SEQ ID NO: 48) (SEQ ID NO: 73) (SEQ ID NO: 100) SIDDSGATTYYADSVKG NYSSFDY YASSLQS QQAANYPTT (SEQ ID NO: 14) (SEQ ID NO: 48) (SEQ ID NO: 73) (SEQ ID NO: 100) SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID NO: 48) (SEQ ID NO: 70) (SEQ ID NO: 101) SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID NO: 48) (SEQ ID NO: 70) (SEQ ID NO: 101) SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID NO: 48) (SEQ ID NO: 70) (SEQ ID NO: 101) SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID NO: 48) (SEQ ID NO: 70) (SEQ ID NO: 101) SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID NO: 48) (SEQ ID NO: 70) (SEQ ID NO: 101) SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID NO: 48) (SEQ ID NO: 70) (SEQ ID NO: 101) SISTNGSSTYYADSVKG NYSSFDY DASGLQS QQGDTSPTT (SEQ ID NO: 16) (SEQ ID NO: 48) (SEQ ID NO: 74) (SEQ ID NO: 102) SISTNGSSTYYADSVKG NYSSFDY DASGLQS QQGDTSPTT (SEQ ID NO: 16) (SEQ ID NO: 48) (SEQ ID NO: 74) (SEQ ID NO: 102) SISTNGSSTYYADSVKG NYSSFDY DASGLQS QQGDTSPTT (SEQ ID NO: 16) (SEQ ID NO: 48) (SEQ ID NO: 74) (SEQ ID NO: 102) SISTNGSSTYYADSVKG NYSSFDY DASGLQS QQGDTSPTT (SEQ ID NO: 16) (SEQ ID NO: 48) (SEQ ID NO: 74) (SEQ ID NO: 102) SIDTTGTTTYFADSVKG NYSSFDY SASYLQS QQGYSAPTT (SEQ ID NO: 17) (SEQ ID NO: 48) (SEQ ID NO: 75) (SEQ ID NO: 103) TISYSGNNTYYADSVKG NYSSFDY TASSLQS QQGYTSPTT (SEQ ID NO: 18) (SEQ ID NO: 48) (SEQ ID NO: 76) (SEQ ID NO: 104) SIDAGGNGTYYADSVKG NYSSFDY TASNLQS QQNNYYPTT (SEQ ID NO: 19) (SEQ ID NO: 48) (SEQ ID NO: 77) (SEQ ID NO: 105) SIDAGGNGTYYADSVKG NYSSFDY YASSLQS QQSDAYPTT (SEQ ID NO: 19) (SEQ ID NO: 48) (SEQ ID NO: 73) (SEQ ID NO: 106) SIDAGGNGTYYADSVKG NYSSFDY YASSLQS QQSDAYPTT (SEQ ID NO: 19) (SEQ ID NO: 48) (SEQ ID NO: 73) (SEQ ID NO: 106) SIDAGGNGTYYADSVKG NYSSFDY YASSLQS QQSDAYPTT (SEQ ID NO: 19) (SEQ ID NO: 48) (SEQ ID NO: 73) (SEQ ID NO: 106) SIDAGGNGTYYADSVKG NYSSFDY YASSLQS QQSDAYPTT (SEQ ID NO: 19) (SEQ ID NO: 48) (SEQ ID NO: 73) (SEQ ID NO: 106) SIDSAGNATYYADSVKG NYSSFDY AASTLQS TSNYPTTQQ (SEQ ID NO: 20) (SEQ ID NO: 48) (SEQ ID NO: 78) (SEQ ID NO: 107) SITDSGDTTYYADSVKG NYSTFDY SASSLQS QQSNATPTT (SEQ ID NO: 21) (SEQ ID NO: 49) (SEQ ID NO: 79) (SEQ ID NO: 108) SITDSGDTTYYADSVKG NYSTFDY SASSLQS QQSNATPTT (SEQ ID NO: 21) (SEQ ID NO: 49) (SEQ ID NO: 79) (SEQ ID NO: 108) SITDSGDTTYYADSVKG NYSTFDY SASSLQS QQSNATPTT (SEQ ID NO: 21) (SEQ ID NO: 49) (SEQ ID NO: 79) (SEQ ID NO: 108) SITDSGDTTYYADSVKG NYSTFDY SASSLQS QQSNATPTT (SEQ ID NO: 21) (SEQ ID NO: 49) (SEQ ID NO: 79) (SEQ ID NO: 108) SITDSGDTTYYADSVKG NYSTFDY SASSLQS QQSNATPTT (SEQ ID NO: 21) (SEQ ID NO: 49) (SEQ ID NO: 79) (SEQ ID NO: 108) SIATTGDNTYYADSVKG NYSYFDY TASTLQS QQAAGNPTT (SEQ ID NO: 22) (SEQ ID NO: 50) (SEQ ID NO: 80) (SEQ ID NO: 109) AINAYGGSTYYADSVKG NYSYFDY AASSLQS QQGSDYPTT (SEQ ID NO: 23) (SEQ ID NO: 50) (SEQ ID NO: 62) (SEQ ID NO: 110) AINAYGGSTYYADSVKG NYSYFDY AASSLQS QQGSDYPTT (SEQ ID NO: 23) (SEQ ID NO: 50) (SEQ ID NO: 62) (SEQ ID NO: 110) SIATTGTSTTYADSVKG NYSYFDY TASSLQS QQGSTAPTT (SEQ ID NO: 24) (SEQ ID NO: 50) (SEQ ID NO: 76) (SEQ ID NO: 111) SIATTGTSTTYADSVKG NYSYFDY TASSLQS QQGSTAPTT (SEQ ID NO: 24) (SEQ ID NO: 50) (SEQ ID NO: 76) (SEQ ID NO: 111) TIDTAGSYTDYADSVKG NYSYFDY GASTLQS QQSTASPST (SEQ ID NO: 25) (SEQ ID NO: 50) (SEQ ID NO: 81) (SEQ ID NO: 112) SISNNGSSTYYADSVKG NYSYFDY AASNLQS QQTSSYPTT (SEQ ID NO: 26) (SEQ ID NO: 50) (SEQ ID NO: 82) (SEQ ID NO: 113) SIAYGGAGTDYADSVKG NYTAFDY AASYLQS QQGAGSPST (SEQ ID NO: 27) (SEQ ID NO: 51) (SEQ ID NO: 64) (SEQ ID NO: 114) AIANTGSATNYADSVKG NYTAFDY DASTLQS QQRNTSPTT (SEQ ID NO: 28) (SEQ ID NO: 51) (SEQ ID NO: 83) (SEQ ID NO: 115) SISTAGTYTDYADSVKG NYTDFDY SASYLQS QQSNTSPAT (SEQ ID NO: 29) (SEQ ID NO: 52) (SEQ ID NO: 75) (SEQ ID NO: 116) SISTAGTYTDYADSVKG NYTDFDY SASYLQS QQSNTSPAT (SEQ ID NO: 29) (SEQ ID NO: 52) (SEQ ID NO: 75) (SEQ ID NO: 116) SINDTGYTTYYADSVKG NYTYFDY TASTLQS QQAYTAPTT (SEQ ID NO: 30) (SEQ ID NO: 53) (SEQ ID NO: 80) (SEQ ID NO: 117) SIASSGTTTYYADSVKG SYADFDY AASNLQS QQADTYPTT (SEQ ID NO: 31) (SEQ ID NO: 54) (SEQ ID NO: 82) (SEQ ID NO: 118) TITSTGAATAYADSVKG SYATFDY AASYLQS QQAANSPDT (SEQ ID NO: 32) (SEQ ID NO: 55) (SEQ ID NO: 64) (SEQ ID NO: 119) AIDGTGYGTAYADSVKG SYDTFDY GASSLQS QQTSDYPNT (SEQ ID NO: 33) (SEQ ID NO: 56) (SEQ ID NO: 84) (SEQ ID NO: 120) SIANAGTATYYADSVKG SYSNFDY SASTLQS QQASTSPTT (SEQ ID NO: 34) (SEQ ID NO: 57) (SEQ ID NO: 66) (SEQ ID NO: 121) SIDSAGDSTYYADSVKG SYSYFDY TASYLQS QQASDYPTT (SEQ ID NO: 35) (SEQ ID NO: 58) (SEQ ID NO: 85) (SEQ ID NO: 122) SISSSGDTTYYADSVKG SYSYFDY TASTLQS QQSSSNPTT (SEQ ID NO: 36) (SEQ ID NO: 58) (SEQ ID NO: 80) (SEQ ID NO: 123) SIDTGGSYTDYADSVKG SYTTFDY SASYLQS QQGSNSPTT (SEQ ID NO: 37) (SEQ ID NO: 59) (SEQ ID NO: 75) (SEQ ID NO: 124) SIDTGGSYTDYADSVKG SYTTFDY SASYLQS QQGSNSPTT (SEQ ID NO: 37) (SEQ ID NO: 59) (SEQ ID NO: 75) (SEQ ID NO: 124) SIDTGGSYTDYADSVKG SYTTFDY SASYLQS QQGSNSPTT (SEQ ID NO: 37) (SEQ ID NO: 59) (SEQ ID NO: 75) (SEQ ID NO: 124) SIDTGGSYTDYADSVKG SYTTFDY SASYLQS QQGSNSPTT (SEQ ID NO: 37) (SEQ ID NO: 59) (SEQ ID NO: 75) (SEQ ID NO: 124) SIDASGANTAYADSVKG TYGTFDY SASYLQS QQSATTPDT (SEQ ID NO: 38) (SEQ ID NO: 60) (SEQ ID NO: 75) (SEQ ID NO: 125)

In one embodiment of the invention, the antibody may be an scFv selected from the group consisting of the following:

3-11A, 6-6E, 1-7G, 3-7B, 6-9D, 1-1C, 1-8D, 1-3G, 4-12C, 6-3E, 6-9A, 1-12A, 4-6A, 4-8A, 4-9F, 4-4H, 3-3A, 3-6F, 6-10H, 12E, 3-5G, 3-4D, 3-5D, 6-4E, 3-6B, 3-6G, 4-11F, 6-7H, 1-11E, 1-2F, 1-6H, 3-8D, 1-4D, 4-2F, 3-3B, 3-5C, 6-9C, 4G, 3-12F, 3-4G, 6-11F, 6-11H, 3-2C, 5B, 6-10G, 1-4H, 4-5A, 4-1B, 4-12D, 6-4B, 1-2E, 1-7F, 1-10F, 1-9G, 4-1C, 6-7G, 3-7H, 6-1F, 6-3B, 4H, 3-9A, 6-10D, 3-5H, 3-2F, 1-6G, 3-11H, 6-9F, 3-9D, 4-3H, 3-3E, 3-10C, 3-11E, 6-8C, 6-11D, 4-5H, 6-5F, 6-7F, 1-10D

These scFvs are listed in Table 3 in the Examples below and comprise the CDRH2, CDRH3, CDRL2 and CDRL3 sequences shown in Table 1.

In one embodiment of the invention, the scFv may comprise a sequence as shown in Table 2.

TABLE 2 Clone I.D. VH-CDR2 VH-CDR3 VL-CDR2 VL-CDR3 1-2E SITDSGDTTYYADSVKG NYSTFDY SASSLQS QQSNATPTT (SEQ ID NO: 21) (SEQ ID NO: 49) (SEQ ID NO: 79) (SEQ ID NO: 108) 1-11E SIDDSGATTYYADSVKG NYSSFDY YASSLQS QQAANYPTT (SEQ ID NO: 14) (SEQ ID NO: 48) (SEQ ID NO: 73) (SEQ ID NO: 100) 1-4D SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID NO: 48) (SEQ ID NO: 70) (SEQ ID NO: 101) 1-12A SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID NO: 45) (SEQ ID NO: 65) (SEQ ID NO: 92) 12E SINDSGTTTYYADSVKG NYSAFDY AASDLQS QQSDSAPTT (SEQ ID NO: 9) (SEQ ID NO: 46) (SEQ ID NO: 67) (SEQ ID NO: 93) 3-9A TIDTAGSYTDYADSVKG NYSYFDY GASTLQS QQSTASPST (SEQ ID NO: 25) (SEQ ID NO: 50) (SEQ ID NO: 81) (SEQ ID NO: 112) 3-5C SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID NO: 48) (SEQ ID NO: 70) (SEQ ID NO: 101) 3-11E SIDSAGDSTYYADSVKG SYSYFDY TASYLQS QQASDYPTT (SEQ ID NO: 35) (SEQ ID NO: 58) (SEQ ID NO: 85) (SEQ ID NO: 122) 3-2F AIANTGSATNYADSVKG NYTAFDY DASTLQS QQRNTSPTT (SEQ ID NO: 28) (SEQ ID NO: 51) (SEQ ID NO: 83) (SEQ ID NO: 115) 3-6G SINSNGTDTYYADSVKG NYSDFDY TASALQS QQGYGAPTT (SEQ ID NO: 12) (SEQ ID NO: 47) (SEQ ID NO: 71) (SEQ ID NO: 98) 3-9D SIASSGTTTYYADSVKG SYADFDY AASNLQS QQADTYPTT (SEQ ID NO: 31) (SEQ ID NO: 54) (SEQ ID NO: 82) (SEQ ID NO: 118) 6-3B SIATTGTSTTYADSVKG NYSYFDY TASSLQS QQGSTAPTT (SEQ ID NO: 24) (SEQ ID NO: 50) (SEQ ID NO: 76) (SEQ ID NO: 111) 6-11D SIDTGGSYTDYADSVKG SYTTFDY SASYLQS QQGSNSPTT (SEQ ID NO: 37) (SEQ ID NO: 59) (SEQ ID NO: 75) (SEQ ID NO: 124) 6-9F SINDTGYTTYYADSVKG NYTYFDY TASTLQS QQAYTAPTT (SEQ ID NO: 30) (SEQ ID NO: 53) (SEQ ID NO: 80) (SEQ ID NO: 117) 6-7G SIATTGDNTYYADSVKG NYSYFDY TASTLQS QQAAGNPTT (SEQ ID NO: 22) (SEQ ID NO: 50) (SEQ ID NO: 80) (SEQ ID NO: 109)

Typically, the scFv is 1-11E.

Oxidised Collagen II (CII) is post-translationally modified Collagen II (CII) that has been oxidised by non enzymatic glycation or by reactive oxidant species (ROS) which may include superoxide radical (O₂), hydrogen peroxide (H₂O₂), hydroxyl radical (OH), hypochlorous acid (HOCl), nitric oxide (NO) and peroxynitrite (ONOO).

The antigen may therefore be HOCl-Collagen II or Ribose-Collagen II.

The antibody or fragment thereof is conjugated to the pharmaceutically active moiety which may be a peptide or peptide-based molecule by any suitable means. Where the pharmaceutically active moiety is a peptide or peptide-based molecule the conjugation may be by means of a peptide bond, including the insertion of one or more amino acid residues.

The conjugation of a peptide or a peptide-based molecule may be achieved by any generally convenient chemical means or biological means (see for example, Wu & Senter Nature Biotechnology, volume 23 (9) pages 1137-1146 (2005); “Chemistry of Protein Conjugation and Crosslinking” by S. S. Wong, CRC Press Inc. (1991)).

Chemical conjugation typically uses a bifunctional chemical reagent, for example glutaraldehyde can link molecules to the N-terminus of a peptide, carbodiimide can link molecules to the C-terminus of a peptide, succinimide esters (e.g. MBS, SMCC) can bind free amino groups and cysteine residues, benzidine links to tyrosine residues, periodate attaches to carbohydrate groups and isothiocyanate can also link molecules to antibodies.

Alternatively, a fusion protein may be synthesised using standard recombinant molecular biology techniques (see for example, Sambrook et al “Molecular Cloning: A Laboratory Manual”, 3^(rd) edition, CSHL Press, (2001); Trachsel et al Arthritis Research & Therapy, volume 9 (1) R9 (2007); Nagai Arthritis & Rheumatism, volume 54 (10) pages 3126-3134 (2006)). Methods for producing fusion proteins are described in the Examples herein.

In certain embodiments of the invention, the insertion of additional amino acid residues between the antibody or fragment thereof and the pharmaceutically active moiety may represent a site for cleavage by a protease. The proteolytic cleavage site may comprise any protease specific cleavage site. The proteolytic cleavage site may include, but is not limited to, a matrix metalloproteinase (MMP) cleavage site, a serine protease cleavage site, a site cleavable by a parasitic protease derived from a pathogenic organism (Zhang et al., J. Mol. Biol. 289, 1239-1251 (1999); Voth et al., Molecular and Biochemical Parasitology, 93, 31-41 (1998); Yoshioka et al., Folia Pharmacologica Japonica, 110, 347-355 (1997); Tort et al., Advances in Parasitology, 43, 161-266 (1999); McKerrow, International Journal for Parasitology, 29, 833-837 (1999); Young et al., International Journal for Parasitology, 29, 861-867 (1999); Coombs and Mottram, Parasitology, 114, 61-80 (1997)) or a site cleavable by the proteins of the complement cascade (Carroll, Annu. Rev. Immunol. 16, 545-568 (1998); Williams et al., Ann. Allergy, 60, 293-300 (1988)).

The MMP cleavage site may comprise any amino acid sequence which is cleavable by a MMP. The amino acid sequence of the MMP cleavage site may be encoded by a nucleic acid sequence coding for an MMP sequence as shown in FIGS. 5A, 5B, 5C, and 5D or a sequence of nucleotides which has at least 50%, 60%, 70%, 80%, 90%, 95% or 99% identity, using the default parameters of the BLAST computer program provided by HGMP, thereto. Preferably, the nucleic acid sequence encoding the MMP cleavage site comprises the minimum number of residues required for recognition and cleavage by MMP.

A MMP cleavage site may comprise a number of amino acid residues recognisable by MMP. Moreover, the amino acids of the MMP site may be linked by one or more peptide bonds which are cleavable, proteolytically, by MMP. MMPs which may cleave the MMP site include, but are not limited to, MMP1, MMP2, MMP3, MMP7, MMP8, MMP9 or MMP10 (Yu and Stamenkovic, Genes and Dev. 14, 163-176 (2000); Nagase and Fields, Biopolymers, 40, 399-416 (1996); Massova et al., J. Mol. Model. 3, 17-30 (1997); reviewed in Vu and Werb, Genes and Dev. 14, 2123-2133 (2000)). The sequences of the protein cleavage sites of MMP1, MMP2, MMP3, MMP7, MMP8, MMP9 and MMP10 are shown in FIGS. 5A, 5B, 5C, and 5D.

Preferably, the proteolytic cleavage site of the present invention is cleaved at sites of inflammation and tissue remodeling. More preferably, the proteolytic cleavage site of the present invention is a MMP cleavage site e.g. any one or more of MMP1, MMP2, MMP3, MMP7, MMP8, MMP9 or MMP10 as shown in FIGS. 5A, 5B, 5C, and 5D.

The pharmaceutically active moiety may comprise one or more molecules which may be the same or different, one or more radioisotopes which may be the same or different, or one or more non-radioactive elements which may be the same or different.

In some embodiments of the invention, the pharmaceutically active moiety may comprise a polypeptide or non-polypeptide molecule. References to a polypeptide include a peptide and vice versa unless the context specifies otherwise.

The polypeptide may be an antibody or a fragment thereof, such as an anti-TNFalpha monoclonal antibody (for example infliximab or adalimumab), a soluble p75 TNF receptor molecule (for example etanercept) or a IL-1 receptor antagonist (for example anakinra). In such embodiments of the invention, the composition will therefore comprise a bispecific antibody which may be a diabody (scFv with a linker which is too short to allow pairing between VH and VL and therefore the domains are forced to pair with the complementary domain of another scFv to create two antigen binding site), a minibody (composed of two scFv moieties linked via a constant heavy chain region (CH3)), a scFv-Fc molecule, or an intact antibody molecule containing the two separate binding regions.

For example, a bispecific antibody may comprise a first binding region specific for modified Collagen II (CII) and a second binding region specific for anti-TNFa.

In one embodiment, the polypeptide is a TNF receptor (TNFR) antibody fusion protein, typically a TNFR2-Fc fusion protein.

A bispecific antibody of the invention may also further comprise another pharmaceutically active moiety. For example, a composition of the invention may comprise a first binding region specific for modified Collagen II, a second binding region specific for CD64, and a toxin, such as Ricin A.

Alternatively, the polypeptide may be a growth factor (e.g. TGFβ, epidermal growth factor (EGF), platelet derived growth factor (PDGF), nerve growth factor (NGF), colony stimulating factor (CSF) granulocyte/macrophage colony stimulating factor (GM-CSF), hepatocyte growth factor, insulin-like growth factor, placenta growth factor); differentiation factor, cytokine molecule, for example an interleukin, (e.g. IL1 IL-2, IL-3, IL-4, IL-5, IL-6, IL-7, IL-8, IL-9, IL-10, IL-11, IL-12, IL-13, IL-14, IL-15, IL-16, IL-17, IL-18, IL-19, IL-20 or IL-21, either a or (3), an interferon (e.g. IFN-α, IFN-β and IFN-γ), tumour necrosis factor (TNF), IFN-γ inducing factor (IGIF), a bone morphogenetic protein (BMP); a chemokine (for example a MIP (Macrophage Inflammatory Protein) e.g. MIP1α and MIP1β; a MCP (Monocyte Chemotactic Protein) e.g. MCP1, 2 or 3; RANTES (regulated upon activation normal T-cell expressed and secreted)); a trophic factor; a cytokine inhibitor; a cytokine receptor (for example, CD20, CD40, CD40L, CD64); a free-radical scavenging enzyme (e.g. superoxide dismutase or catalase), or a toxin (for example Ricin A toxin, or Pseudomonas exotoxin A), or an active fragment or portion thereof. Typically, the polypeptide is an interferon, typically IFN-β.

See for example, Trachsel et al Arthritis Research & Therapy, volume 9 (1) R9 (2007) reporting antibody-IL10 fusion protein; Nagai Arthritis & Rheumatism, volume 54 (10) pages 3126-3134 (2006) reporting antibody-toxin fusion protein.

Other examples of antibody-fusion proteins, include but are not limited to, antibody-TNFalpha, antibody-GM-CSF, and antibody-IL2 fusion proteins

The pharmaceutically active polypeptide may be derived from the species to be treated e.g. human origin for the treatment of humans.

The composition may also comprise further peptide sequences which can target the composition inside a cell. Such intracellular targeting sequences include, but are not limited to, the TAT sequence YGRKKRQRRR (SEQ ID NO: 126) (see for example, Cohen-Saidon et al Blood, volume 102 (7), pages 2506-2512 (2003)).

As used herein “peptide mimetics” includes, but is not limited to, agents having a desired peptide backbone conformation embedded into a non-peptide skeleton which holds the peptide in a particular conformation. Peptide mimetics, which do not have some of the drawbacks of peptides, are of interest in those cases where peptides are not suitable in medicine.

Peptide mimetics may comprise a peptide backbone which is of the L or D conformation. Examples of peptide mimetics include melanocortin, adrenocorticotrophin hormone (ACTH) and other peptide mimetic agents which play a role in the central nervous system, endocrine system, in signal transduction and in infection and immunity.

The pharmaceutically active agent may comprise a chemical compound such as a chemotherapeutic agent or other synthetic drug. Alternatively, the pharmaceutically active agent may comprise a peptide nucleic acid (PNA) sequence e.g. a poly-lysine sequence which binds to nucleic acids and permeabilises lipid bilayers (Wyman et al., Biological Chemistry, 379, 1045-1052 (1998)) or a KALA peptide which facilitates transfer through lipid bilayers (Wyman et al., Biochemistry, 36, 3008-3017 (1997)).

The non-polypeptide may be a glycosaminoglycan molecule, such as glucosamine (suitably, glucosamine HCl) or chondroitin. Alternatively, the non-polypeptide molecule may be a non-steroidal anti-inflammatory drug (NSAID) such as a non-selective NSAID or a selective NSAID. Examples of non-selective NSAIDs include aspirin, ibuprofen, and naproxen. Examples of selective NSAIDs (also called COX-2 inhibitors) include celecoxib (Celebrex®), rofecoxib (Vioxx®) and valdecoxib (Bextra®)). Other substances may include steroids, such as cortisol, or polymeric molecules such as sodium hyaluronate or hyaluronic acid (for example hyaluronan (Hyalgan®) and hylan-GF-20 (Synvisc®)), or drug substances such as colchicine or hydroxychloroquine (Plaquenil®).

Non-polypeptides may be conjugated to the antibody or fragment thereof using a linker that may be a labile bond in order to permit release of the pharmaceutically active substance. For example, a hydrazone bond may be used where the drug is released under acidic conditions, or a disulfide bond which is reduced to release the drug, or also a peptide bond which is cleaved enzymatically by a protease as described above.

In some embodiments, the composition may comprise a radioactive element or a non-radioactive element. The radioisotope may be an alpha particle-emitting radionuclide such as ²¹³Bi or ²¹¹At, a beta particle-emitting radionuclide such as ¹³¹I, ⁹⁰Y, ¹⁷⁷Lu or ⁶⁷Cu, a gamma radiation-emitting radionuclide such as ^(99m)Tc, ¹²³I or ¹¹¹In, or a positron-emitting radionuclide such as ¹⁸F, ⁶⁴Cu, ⁶⁸Ga, ⁸⁶Y or ¹²⁴I. Radioisotopes may be used in order to render the composition detectably labelled for diagnostic uses of the composition.

Alternatively, the non-radioactive element may be Au, Fe, Cu, Pt or Ag.

Combinations of the various elements and substances described above may also be included as desired.

According to a second aspect of the invention, there is provided a composition of the first aspect for use in medicine. This aspect of the invention includes a composition of the first aspect for use in the treatment of an arthropathy, such as rheumatoid arthritis (RA) and osteoarthritis (OA). This aspect of the invention therefore extends to a method of treatment of an arthropathy, such as rheumatoid arthritis (RA) and osteoarthritis (OA), comprising the step of administering to a subject a composition of the first aspect of the invention. The present invention therefore also includes the use of a composition of the first aspect of the invention in the manufacture of a medicament for the treatment of an arthropathy, such as rheumatoid arthritis (RA) and osteoarthritis (OA).

A composition of the first aspect of the invention may therefore be formulated as a pharmaceutical composition. Suitably, a pharmaceutical composition may comprise a diluent, excipient, adjuvant and/or physiologically acceptable buffer.

The pharmaceutical composition may be administered in any effective, convenient manner effective for treating a disease as described above including, for instance, administration by oral, topical, intravenous, intramuscular, intra-articular, intranasal, or intradermal routes among others. In therapy or as a prophylactic, the composition of the invention may be administered to an individual as an injectable composition, for example as a sterile aqueous dispersion, preferably isotonic. The injection may suitably be made into the joint affected by the disease.

For administration to mammals, and particularly humans, it is expected that the daily dosage of the composition of the invention will be from 0.01 mg/kg body weight, typically around 1 mg/kg. The physician in any event will determine the actual dosage which will be most suitable for an individual which will be dependant on factors including the age, weight, sex and response of the individual. The above dosages are exemplary of the average case. There can, of course, be instances where higher or lower dosages are merited, and such are within the scope of this invention

According to a third aspect of the present invention, there is provided a method for the diagnosis of an arthropathy, such as rheumatoid arthritis (RA) and osteoarthritis (OA), comprising the steps of administering a detectably labelled composition comprising an antibody or fragment thereof against oxidised Collagen II (CII) to a subject and subsequently detecting the composition. This aspect of the invention therefore extends to a detectably labelled composition comprising an antibody or fragment thereof against oxidised Collagen II (CII) for use in the diagnosis of an arthropathy, such as rheumatoid arthritis (RA) and osteoarthritis (OA). Such embodiments also extend to the use of such compositions in the manufacture of an agent for the diagnosis of an arthropathy, such as rheumatoid arthritis (RA) and osteoarthritis (OA).

The detectable label may be a radioactive or a fluorescent label. In some embodiments the radioisotope may be an alpha particle-emitting radionuclide such as ²¹³Bi or ²¹¹At, a beta particle-emitting radionuclide such as ¹³¹I ⁹⁰Y, ¹⁷⁷Lu or ⁶⁷Cu, a gamma radiation-emitting radionuclide such as ^(99m)Tc, ¹²³I or ¹¹¹In, or a positron-emitting radionuclide such as ¹⁸F, ⁶⁴Cu, ⁶⁸Ga, ⁸⁶Y or ¹²⁴I. Radioisotopes may be used in order to render the composition detectably labelled for diagnostic uses of the composition.

For diagnostic purposes, fluorescent dyes such as Alexa Fluor 488 or the Cy3 monofunctional N-hydroxysuccinimide (NHS) ester could also be used.

According to a fourth aspect of the invention, there is provided a composition comprising an antibody or fragment thereof against oxidised Collagen II (CII) and a detectable label.

RA is the most common chronic inflammatory autoimmune disease, with disability occurring usually within 10 years. Over activation of the inflammatory pathway leads to synovitis, joint damage and destruction. Key players in the joint inflammation are inflammatory cytokines such as TNFa and IL-1. The efficacy of anti-TNFa monoclonal antibodies (Infliximab and Adalimumab), soluble p75 TNF receptors (Etanercept) and IL-1 receptor antagonist (Anakinra) in the treatment of RA patients unresponsive to traditional therapy is now well established but unfortunately might be associated with an increase in serious infection and malignancies. It is therefore becoming very important to develop targeted delivery of anti-proinflammatory drugs to the inflamed joint rather than systemic administration because cytokines exert their function as auto or paracrine factors with high concentrations only in close vicinity of the producing cell. Systemic administration of sufficient blocking agents that can block the local high physiological concentration will likely cause severe side effects.

Although CII is the best candidate to target therapy to the joint one needs to find a way to target the drugs solely to the inflamed joints. The present studies show the development of a targeting antibody that will specifically recognise collagen type II that has been modified by ROS present in inflamed joint which then allows targeting to inflammatory damage joint independently of the aetiology.

By employing the phage display human antibody library, a panel of human scFvs was developed (FIG. 1) that bind only to CII which was modified in vitro by HOCl or glycation, known reactive oxidants in RA. Most importantly this scFv binds only to damaged cartilage but not to normal cartilage (FIG. 3A, 3B, 3C, 3D, 3E, 3F, 3G, 3H) and inversely correlates with the staining of safranin-O for the integrity of cartilage-specific proteoglycan. Most importantly, when inflammation was induced in only one paw in CH3 mice with antigen induced arthritis model 1-11E diabody localized only to the inflamed paw without any background to any of the other healthy paws (FIG. 4). This strongly supports the specificity of 1-11E for damaged CII in vivo in inflammation setting and therefore have potential for targeting anti-TNFa, other pro-inflammatory cytokine blockade or cartilage regenerating factors to inflamed joints. This approach is significantly different from targeting citrullinated peptides that appear as a good biomarker for disease in RA but could not be used as a targeting molecule as its tissue expression is not joint specific.

Preferred features of the second and subsequent aspects of the invention are as for the first aspect mutatis mutandis.

In one embodiment, a composition of the invention comprises mouse interferon-beta (IFN-β), the scFv 1-11E and a MMP cleavage site. Such a composition can be produced by creating pFastBac1.AH by cutting out a BamHI/HindIII fragment containing multiple cloning sites (MCS) from pFastBac1 (Invitrogen) and replacing this fragment with a linker to give another MCS of BamHI-KpnI-HindIII-ApaI, cloning mouse interferon b (mIFNb) into the HindIII-EcoRI sites and cloning MMP and 1-11E into the NotI and ApaI site as shown in FIG. 10A.

Mouse interferon-beta is typically amplified using primers having the sequences shown in SEQ ID NO: 129 (forward) and SEQ ID NO: 130 (reverse). 1-11E is typically amplified using primers having the sequences shown in SEQ ID NO: 131 (forward) and SEQ ID NO: 132 (reverse), wherein 1-11E is amplified with NotI/ApaI ends to include a histidine (His) tag.

1-11E is typically then cloned into FastBac1.AH mIFN-b/MMP/SP/His and cut with Not/Apa to liberate SP/His. The mIFN-beta/His construct is typically cloned by amplifying mIFN-b with HindIII/ApaI using primers having the sequence shown in SEQ ID NO: 129 (forward) and SEQ ID NO: 133 (reverse).

The constructs are then typically transformed into DH10Bac cells (Invitrogen).

In another embodiment, a composition of the invention comprises TNF receptor 2-Fc (TNFR2Fc), an scFv (either 1-11E or C7 as a negative control) and a MMP cleavage site. Such a composition can be produced by creating pFastBac1.AH from pFastBac1 (Invitrogen) by cutting out a BamHI/HindIII fragment containing multiple cloning sites (MCS), and replacing this fragment with a linker to give another MCS of BamHI-KpnI-HindIII-ApaI, cloning TNFR2Fc into the HindIII-EcoRI sites and cloning a MMP cleavage site and scFv (1-11E or C7) into the NotI and ApaI sites as shown in FIG. 10B.

Mouse TNFR2-Fc is typically amplified using primers having the sequences shown in SEQ ID NO: 141 (forward) and SEQ ID NO: 142 (reverse). 1-11E is typically amplified using primers having the sequences shown in SEQ ID NO: 131 (forward) and SEQ ID NO: 132 (reverse), wherein 1-11E is amplified with NotI/ApaI ends to include a histidine (His) tag.

Expression of the constructs is typically carried out using a protocol set out in FIG. 11. Such a protocol typically involves the following steps:

-   -   1. Transforming the constructs into competent DH10Bac cells         (Invitrogen) to generate bacmid vectors.     -   2. Confirming recombinant bacmid vectors by blue-white screening         and PCR, typically according to Invitrogen instructions.     -   3. Transfecting bacmid DNA into Sf9 insect cells using         cellfectin, typically according to Invitrogen instructions.     -   4. Harvesting baculovirus (P1) from the supernatant of         transfected cells.     -   5. Using the harvested baculovirus to infect fresh Sf9 cells to         amplify the virus stocks.     -   6. Using P3 virus to infect High 5 insect cells, typically for         72 hours.

In one embodiment, infected High 5 cells are grown for 3 days at 27° C.

The supernatant is typically then collected and run on an SDS-PAGE gel. Recombinant proteins can be detected by Western blot, for example using anti-tetra-His antibody (Qiagen) and anti-mouse HRP (Sigma).

The invention will now be described by way of reference to the following Examples which are present for the purposes of illustration only and are not to be construed as being limiting on the present invention. Reference is also made in the Examples to the following drawings in which:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows representative ELISA of unique scFvs

FIG. 2 shows Western Blotting with scFv 1-11E probe

FIGS. 3A, 3B, 3C, 3D, 3E, 3F, 3G, and 3H show specific binding to damaged human cartilage tissue by anti-ROS-modified CII scFv in patients with OA in photographs (A) to (H).

FIG. 4 shows the localisation of scFv 1-11E in inflamed paw.

FIGS. 5A, 5B, 5C, and 5D show the sequences of the protein cleavage sites of MMP1, MMP2, MMP3, MMP7, MMP8, MMP9 and MMP10.

FIG. 6 shows specific binding to damaged human cartilage tissue by anti-ROS-modified CII scFv in patients with OA.

FIG. 7 shows specific binding to damaged human cartilage tissue by anti-ROS-modified CII scFv in patients with RA.

FIGS. 8A, 8B, 8C, 8D, and 8E show: (A) and (B) histological staining of the right paw; (C) and (D) 1-11E staining of cartilage in the paw; (E) staining with a non-relevant scFv; all in a mouse RA model.

FIG. 9 shows staining of a joint surface injury in a mouse OA model.

FIGS. 10A and 10B show the construction of (A) an IFN-β/1-11E fusion protein; and (B) a TNFR2Fc/scFv fusion protein.

FIG. 11 shows the protocol used for expression of the IFN-β/1-11E fusion protein and the TNFR2Fc/scFv fusion protein.

FIG. 12 is a Western blot of the IFN-β/1-11E fusion protein.

FIGS. 13A, 13B, and 13C is a Western blots of (A) and (B) TNFR2Fc/1-11E fusion proteins; (C) a TNFR2Fc/C7 fusion protein.

EXAMPLE 1 Preparation and Modification of CII

CII was prepared from bovine cartilage as in Miller (Miller, Biochemistry 11(26): 4903-4909, 1972) and subsequently exposed to reactive oxygen generating systems as previously described (Nissim A, 2005). Briefly, CII was modified with (⁻OH), HOCl (Hawkins CL, 2001; Hawkins CL, 2002), (ONOO⁺), or 2M ribose by ON incubation at 37° C. Bovine serum albumin (BSA, Sigma) was also modified as above and was used as control antigen.

EXAMPLE 2 Selection of Anti-Modified CII scFv from Phase-Display Library

Phage display antibody technology (Winter G et al, Annu. Rev. Immunol. 12: 433-455, 1994) was used to raise a single chain fragment variable (scFv) that binds only to CII that has been post-translationally modified by free radicals.

A human semi-synthetic scFv library constructed from a single human framework for V_(H) (DP-47 and JH4) and V_(L) (DPK9 and JK1) was employed, in which diversity was incorporated in CDR3 and CDR2 (de Wildt R. M et al, Nat. Biotechnol. 18(9): 989-994, 2000). To select for phage binding to modified CII and not to native non-modified CII, subtractive selection was performed using native non-modified CII for subtraction. HOCl modified CII was used as a target for panning as binding to HOCl modified CII was strongest in RA sera (Nissim A, 2005). Glycated CII was used in parallel. Briefly, immunotubes (Nunc-Immuno Tubes, Maxi-Sorp, Nunc, Denmark) were coated with 10 μg/ml CII in phosphate-buffered saline (PBS). After blocking with 2% marvel in PBS (MPBS) coated tubes were exposed for 2 hours to 10¹³ transforming units (tu) of the phage library in 2% MPBS. Unbound phage were then transferred to a second immunotube previously coated with HOCl or ribose-modified CII for a further 2 hours incubation at room temperature. Modified CII-bound phage were then used to infect E. coli TG-1 and rescued by helper phage as described (Harrison J. L, 1996). The panning process was repeated three times and E. coli TG-1 was infected with the final phage eluted after the third round and individual ampicillin-resistant colonies (phage clones) were selected for further analysis.

EXAMPLE 3 Screening and Sequencing of Modified CII-Specific Phage Clones

Screening for positive anti-modified CII phage clones was first performed by enzyme-linked immunosorbent assay (ELISA), as previously described (Harrison J. L, 1996). Microtiter plate (Nunc, Paisley, UK) wells were coated with 10 μg/ml native or modified CII and incubated with 100 μl phage suspension for 90 minutes. In addition, native and modified BSA were used as negative control. After removal of the supernatants, the amount of bound phage was determined using peroxidase-labeled anti-M13 antibodies (GE Healthcare: Ltd, Little Chalfont, Buckinghamshire) and developed by using 100 mM 3,3′5,5′ tetramethylbenzidine (TMB) as substrate. The reaction was monitored in an ELISA reader at 450 nm with a reference wavelength of 650 nm using GENios plate reader (TECAN, Theale Court, Reading UK) and Magellan software (TECAN, Theale Court, Reading UK)

The entire scFv DNA fragment of each modified CII bound phage clone was sequenced using the primers LMB-3 (5′-C AGGAAACAGCTATGAC) (SEQ ID NO: 127) and Fd-Seq (5′-GAATTTTCTGTATGAGG) (SEQ ID NO: 128). Sequences were analyzed using Chromas (Technelysium Pty Ltd) and VBASE (http://vbase.mrc-cpe.cam.ac.uk), to identify unique scFv sequences as shown in Table 3.

TABLE 3 Clone Antigen CDRH2 CDRH3 CDRL2 CDRL3 3-11A HOCl-CII DISSTGSYTAYADSVKG GAGSFDY AASALQS QQSSSTPTT (SEQ ID NO: 1) (SEQ ID (SEQ ID (SEQ ID NO: NO: 39) NO: 61) 86) 6-6E HOCl-CII AISAAGTATAYADSVKG GYDTFDY AASSLQS QQNYGYPNT (SEQ ID NO: 2) (SEQ ID (SEQ ID (SEQ ID NO: NO: 40) NO: 62) 87) 1-7G Ribose-CII SISNSGSYTDYADSVKG GYGSFDY AASTLQS QQANSSPDT (SEQ ID NO: 3) (SEQ ID (SEQ ID (SEQ ID NO: NO: 41) NO: 63) 88) 3-7B HOCl-CII SINNYGSNTAYADSVKG GYSSFDY AASYLQS QQTSSSPDT (SEQ ID NO: 4) (SEQ ID (SEQ ID (SEQ ID NO: NO: 42) NO: 64) 89) 6-9D HOCl-CII SINNYGSNTAYADSVKG GYSSFDY AASYLQS QQTSSSPDT (SEQ ID NO: 4) (SEQ ID (SEQ ID (SEQ ID NO: NO: 42) NO: 64) 89) 1-1C Ribose-CII SISYTGNSTDYADSVKG GYTAFDY YASYLQS QQADSTPTT (SEQ ID NO: 5) (SEQ ID (SEQ ID (SEQ ID NO: NO: 43) NO: 65) 90) T-8D Ribose-CII SISYTGNSTDYADSVKG GYTAFDY YASYLQS QQADSTPTT (SEQ ID NO: 5) (SEQ ID (SEQ ID (SEQ ID NO: NO: 43) NO: 65) 90) 1-3G Ribose-CII SISYTGNSTDYADSVKG GYTAFDY YASYLQS QQADSTPTT (SEQ ID NO: 5) (SEQ ID (SEQ ID (SEQ ID NO: NO: 43) NO: 65) 90) 4-12C Ribose-CII SISYTGNSTDYADSVKG GYTAFDY YASYLQS QQADSTPTT (SEQ ID NO: 5) (SEQ ID (SEQ ID (SEQ ID NO: NO: 43) NO: 65) 90) 6-3E HOCl-CII SISYTGNSTDYASVKG GYTAFDY YASYLQS QQADSTPTT (SEQ ID NO: 5) (SEQ ID (SEQ ID (SEQ ID NO: NO: 43) NO: 65) 90) 6-9A HOCl-CII NIATDGTTTYYADSVKG NSTYFDY SASTLQS QQAATSPTT (SEQ ID NO: 6) (SEQ ID (SEQ ID (SEQ ID NO: NO: 44) NO: 66) 91) I-12A Ribose-CII SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID (SEQ ID (SEQ ID NO: NO: 45) NO: 65) 92) 4-6A Ribose-CII SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID (SEQ ID (SEQ ID NO: NO: 45) NO: 65) 92) 4-8A Ribose-CII SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID (SEQ ID (SEQ ID NO: NO: 45) NO: 65) 92) 4-9F Ribose-CII SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID (SEQ ID (SEQ ID NO: NO: 45) NO: 65) 92) 4-4H Ribose-CII SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID (SEQ ID (SEQ ID NO: NO: 45) NO: 65) 92) 3-3A HOCl-CII SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID (SEQ ID (SEQ ID NO: NO: 45) NO: 65) 92) 3-6F HOCl-CII SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID (SEQ ID (SEQ ID NO: NO: 45) NO: 65) 92) 6-10H HOCl-CII SISYTGDSTYYADSVKG NYSAFDY YASYLQS QQADSTPTT (SEQ ID NO: 8) (SEQ ID (SEQ ID (SEQ ID NO: NO: 46) NO: 65) 90) 12E Unknown SINDSGTTTYYADSVKG NYSAFDY AASDLQS QQSDSAPTT (SEQ ID NO: 9) (SEQ ID (SEQ ID (SEQ ID NO: NO: 46) NO: 67) 93) 3-5G HOCl-CII SIDSAGASTYYADSVKG NYSAFDY NASSLQS QQSDTYPST (SEQ ID NO: 10) (SEQ ID (SEQ ID (SEQ ID NO: NO: 46) NO: 68) 94) 3-4D HOCl-CII SISYTGDSTYYADSVKG NYSAFDY TASNLQS QQSYASPTT (SEQ ID NO: 8) (SEQ ID (SEQ ID (SEQ ID NO: NO: 46) NO: 69) 95) 3-5D HOCl-CII SISYTGDSTYYADSVKG NYSAFDY TASNLQS QQSYASPTT (SEQ ID NO: 8) (SEQ ID (SEQ ID (SEQ ID NO: NO: 46) NO: 69) 95) 6-4E HOCl-CII SISYTGDSTYYADSVKG NYSAFDY TASNLQS QQTGSYPTT (SEQ ID NO: 8) (SEQ ID (SEQ ID (SEQ ID NO: NO: 46) NO: 69) 96) 3-6B HOCl-CII SINATGYGTYYADSVKG NYSDFDY SASALQS QQGDSYPTT (SEQ ID NO: 11) (SEQ ID (SEQ ID (SEQ ID NO: NO: 47) NO: 70) 97) 3-6G HOCl-CII SINSNGTDTYYADSVKG NYSDFDY TASALQS QQGYGAPTT (SEQ ID NO: 12) (SEQ ID (SEQ ID (SEQ ID NO: NO: 47) NO: 71) 98) 4-11F Ribose-CII SISATGSSTYYADSVKG NYSDFDY SASDLQS QQSSYTPTT (SEQ ID NO: 13) (SEQ ID (SEQ ID (SEQ ID NO: NO: 47) NO: 72) 99) 6-7H HOCl-CII SISATGSSTYYADSVKG NYSDFDY SASDLQS QQSSYTPTT (SEQ ID NO: 13) (SEQ ID (SEQ ID (SEQ ID NO: NO: 47) NO: 72) 99) 1-11E Ribose-CII SIDDSGATTYYADSVKG NYSSFDY YASSLQS QQAANYPTT (SEQ ID NO: 14) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 73) 100) 1-2F Ribose-CII SIDDSGATTYYADSVKG NYSSFDY YASSLQS QQAANYPTT (SEQ ID NO: 14) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 73) 100) 1-6H Ribose-CII SIDDSGATTYYADSVKG NYSSFDY YASSLQS QQAANYPTT (SEQ ID NO: 14) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 73) 100) 3-8D HOCl-CII SIDDSGATTYYADSVKG NYSSFDY YASSLQS QQAANYPTT (SEQ ID NO: 14) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 73) 100) 1-4D Ribose-CII SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 70) 101) 4-2F Ribose-CII SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 70) 101) 3-3B HOCl-CII SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 70) 101) 3-5C HOCl-CII SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 70) 101) 6-9C HOCl-CII SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 70) 101) 4G Unknown SIASTGDSTYYADSVKG NYSSFDY SASALQS QQASNYPTT (SEQ ID NO: 15) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 70) 101) 3-12F HOCl-CII SISTNGSSTYYADSVKG NYSSFDY DASGLQS QQGDTSPTT (SEQ ID NO: 16) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 74) 102) 3-4G HOCl-CII SISTNGSSTYYADSVKG NYSSFDY DASGLQS QQGDTSPTT (SEQ ID NO: 16) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 74) 102) 6-11F HOCl-CII SISTNGSSTYYADSVKG NYSSFDY DASGLQS QQGDTSPTT (SEQ ID NO: 16) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 74) 102) 6-11H HOCl-CII SISTNGSSTYYADSVKG NYSSFDY DASGLQS QQGDTSPTT (SEQ ID NO: 16) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 74) 102) 3-2C HOCl-CII SIDTTGTTTYFADSVKG NYSSFDY SASYLQS QQGYSAPTT (SEQ ID NO: 17) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 75) 103) 5B Unknown TISYSGNNTYYADSVKG NYSSFDY TASSLQS QQGYTSPTT (SEQ ID NO: 18) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 76) 104) 6-10G HOCl-CII SIDAGGNGTYYADSVKG NYSSFDY TASNLQS QQNNYYPTT (SEQ ID NO: 19) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 77) 105) 1-4H Ribose-CII SIDAGGNGTYYADSVKG NYSSFDY YASSLQS QQSDAYPTT (SEQ ID NO: 19) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 73) 106) 4-5A HOCl-CII SIDAGGNGTYYADSVKG NYSSFDY YASSLQS QQSDAYPTT (SEQ ID NO: 19) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 73) 106) 4-1B HOCl-CII SIDAGGNGTYYADSVKG NYSSFDY YASSLQS QQSDAYPTT (SEQ ID NO: 19) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 73) 106) 4-12D HOCl-CII SIDAGGNGTYYADSVKG NYSSFDY YASSLQS QQSDAYPTT (SEQ ID NO: 19) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 73) 106) 6-4B HOCl-CII SIDSAGNATYYADSVKG NYSSFDY AASTLQS TSNYPTTQQ (SEQ ID NO: 20) (SEQ ID (SEQ ID (SEQ ID NO: NO: 48) NO: 78) 107) 1-2E Ribose-CII SITDSGDTTYYADSVKG NYSTFDY SASSLQS QQSNATPTT (SEQ ID NO: 21) (SEQ ID (SEQ ID (SEQ ID NO: NO: 49) NO: 79) 108) 1-7F Ribose-CII SITDSGDTTYYADSVKG NYSTFDY SASSLQS QQSNATPTT (SEQ ID NO: 21) (SEQ ID (SEQ ID (SEQ ID NO: NO: 49) NO: 79) 108) 1-10F Ribose-CII SITDSGDTTYYADSVKG NYSTFDY SASSLQS QQSNATPTT (SEQ ID NO: 21) (SEQ ID (SEQ ID (SEQ ID NO: NO: 49) NO: 79) 108) 1-9G Ribose-CII SITDSGDTTYYADSVKG NYSTFDY SASSLQS QQSNATPTT (SEQ ID NO: 21) (SEQ ID (SEQ ID (SEQ ID NO: NO: 49) NO: 79) 108) 4-1C Ribose-CII SITDSGDTTYYADSVKG NYSTFDY SASSLQS QQSNATPTT (SEQ ID NO: 21) (SEQ ID (SEQ ID (SEQ ID NO: NO: 49) NO: 79) 108) 6-7G HOCl-CII SIATTGDNTYYADSVKG NYSYFDY TASTLQS QQAAGNPTT (SEQ ID NO: 22) (SEQ ID (SEQ ID (SEQ ID NO: NO: 50) NO: 80) 109) 3-7H HOCl-CII AINAYGGSTYYADSVKG NYSYFDY AASSLQS QQGSDYPTT (SEQ ID NO: 23) (SEQ ID (SEQ ID (SEQ ID NO: NO: 50) NO: 62) 110) 6-1F HOCl-CII AINAYGGSTYYADSVKG NYSYFDY AASSLQS QQGSDYPTT (SEQ ID NO: 23) (SEQ ID (SEQ ID (SEQ ID NO: NO: 50) NO: 62) 110) 6-3B HOCl-CII SIATTGTSTTYADSVKG NYSYFDY TASSLQS QQGSTAPTT (SEQ ID NO: 24) (SEQ ID (SEQ ID (SEQ ID NO: NO: 50) NO: 76) 111) 4H Unknown SIATTGTSTTYADSVKG NYSYFDY TASSLQS QQGSTAPTT (SEQ ID NO: 24) (SEQ ID (SEQ ID (SEQ ID NO: NO: 50) NO: 76) 111) 3-9A HOCl-CII TIDTAGSYTDYADSVKG NYSYFDY GASTLQS QQSTASPST (SEQ ID NO: 25) (SEQ ID (SEQ ID (SEQ ID NO: NO: 50) NO: 81) 112) 6-10D HOCl-CII SISNNGSSTYYADSVKG NYSYFDY AASNLQS QQTSSYPTT (SEQ ID NO: 26) (SEQ ID (SEQ ID (SEQ ID NO: NO: 50) NO: 82) 113) 3-5H HOCl-CII SIAYGGAGTDYADSVKG NYTAFDY AASYLQS QQGAGSPST (SEQ ID NO: 27) (SEQ ID (SEQ ID (SEQ ID NO: NO: 51) NO: 64) 114) 3-2F HOCl-CII AIANTGSATNYADSVKG NYTAFDY DASTLQS QQRNTSPTT (SEQ ID NO: 28) (SEQ ID (SEQ ID (SEQ ID NO: NO: 51) NO: 83) 115) 1-6G Ribose-CII SISTAGTYTDYADSVKG NYTDFDY SASYLQS QQSNTSPAT (SEQ ID NO: 29) (SEQ ID (SEQ ID (SEQ ID NO: NO: 52) NO: 75) 116) 3-11H HOCl-CII SISTAGTYTDYADSVKG NYTDFDY SASYLQS QQSNTSPAT (SEQ ID NO: 29) (SEQ ID (SEQ ID (SEQ ID NO: NO: 52) NO: 75) 116) 6-9F HOCl-CII SINDTGYTTYYADSVKG NYTYFDY TASTLQS QQAYTAPTT (SEQ ID NO: 30) (SEQ ID (SEQ ID (SEQ ID NO: NO: 53) NO: 80) 117) 3-9D HOCl-CII SIASSGTTTYYADSVKG SYADFDY AASNLQS QQADTYPTT (SEQ ID NO: 31) (SEQ ID (SEQ ID (SEQ ID NO: NO: 54) NO: 82) 118) 4-3H Ribose-CII TITSTGAATAYADSVKG SYATFDY AASYLQS QQAANSPDT (SEQ ID NO: 32) (SEQ ID (SEQ ID (SEQ ID NO: NO: 55) NO: 64) 119) 3-3E HOCl-CII AIDGTGYGTAYADSVKG SYDTFDY GASSLQS QQTSDYPNT (SEQ ID NO: 33) (SEQ ID (SEQ ID (SEQ ID NO: NO: 56) NO: 84) 120) 3-10C HOCl-CII SIANAGTATYYADSVKG SYSNFDY SASTLQS QQASTSPTT (SEQ ID NO: 34) (SEQ ID (SEQ ID (SEQ ID NO: NO: 57) NO: 66) 121) 3-11E HOCl-CII SIDSAGDSTYYADSVKG SYSYFDY TASYLQS QQASDYPTT (SEQ ID NO: 35) (SEQ ID (SEQ ID (SEQ ID NO: NO: 58) NO: 85) 122) 6-8C HOCl-CII SISSSGDTTYYADSVKG SYSYFDY TASTLQS QQSSSNPTT (SEQ ID NO: 36) (SEQ ID (SEQ ID (SEQ ID NO: NO: 58) NO: 80) 123) 6-11D HOCl-CII SIDTGGSYTDYADSVKG SYTTFDY SASYLQS QQGSNSPTT (SEQ ID NO: 37) (SEQ ID (SEQ ID (SEQ ID NO: NO: 59) NO: 75) 124) 4-5H Ribose-CII SIDTGGSYTDYADSVKG SYTTFDY SASYLQS QQGSNSPTT (SEQ ID NO: 37) (SEQ ID (SEQ ID (SEQ ID NO: NO: 59) NO: 75) 124) 6-5F HOCl-CII SIDTGGSYTDYADSVKG SYTTFDY SASYLQS QQGSNSPTT (SEQ ID NO: 37) (SEQ ID (SEQ ID (SEQ ID NO: NO: 59) NO: 75) 124) 6-7F HOCl-CII SIDTGGSYTDYADSVKG SYTTFDY SASYLQS QQGSNSPTT (SEQ ID NO: 37) (SEQ ID (SEQ ID (SEQ ID NO: NO: 59) NO: 75) 124) 1-10D Ribose-CII SIDASGANTAYADSVKG TYGTFDY SASYLQS QQSATTPDT (SEQ ID NO: 38) (SEQ ID (SEQ ID (SEQ ID NO: NO: 60) NO: 75) 125)

EXAMPLE 4 Production and Purification of Anti-Modified CII-scFv

The reactive phage clones obtained from E. coli TG-1 bacteria were used to infect E. coli HB2151 non-suppressor bacterial strain to obtain soluble scFv. After overnight induction with 1 mM IPTG at 30° C., the antibody fragments, derived from the V_(H)3 family, were harvested from the supernatant and periplasmic space as described (Harrison J. L, 1996) and purified on a protein A affinity column (GE Healthcare Ltd, Little Chalfont, Buckinghamshire). Binding of purified scFv to modified CII was first analyzed by ELISA as above except that mouse anti-myc tag antibody (Santa Cruz Biotechnology, INC, Wembley, UK) followed by anti-mouse-HRP conjugate (Sigma, Dorset, UK) were used to probe bound scFv.

Anti-Modified CII scFv Raised by Phage Display Human Antibody Library

After three rounds of subtractive selection 82 phage clones specific to either glycated CII or HOCl modified CII were selected out of which 42 clones had unique sequences. 15 representative clones with different binding patterns but with good expression were then studied for further analysis (FIG. 1 and Table 1). As shown in FIG. 1, out of these 15 clones there were 9 clones with stronger binding to modified CII, 3 clones bound to all forms of CII and and 3 clones had no binding reactivity to any form of CII. Three scFvs that have different binding characteristics were then further studied: Clone 1-11E binds to modified CII (glycated, HOCl and to some extent to peroxynitrated CII), clone 6-11D binds to both native and modified CII and clone 12E that does not bind to any form of CII. None of these scFv bound to native or free radical modified BSA, or to collagen type III (data not shown).

EXAMPLE 5 Western Blotting

Western blot using scFv as probe and modified or native CII as target antigens was done as described (Nissim A, 2005). Briefly, modified and native CII (2 μg of each) were run on a 7.5% denaturing SDS gel and electroblotted into a nitrocellulose membrane. After blocking with 2% MPBS, membranes were incubated with 10 μg/ml purified scFv in 2% MPBS for 2 hr at room temperature, followed by incubation with mouse anti-myc tag (Santa Cruz Biotechnology, INC, Wembley, UK) and then with anti-mouse-HRP (Sigma, Dorset). Membranes were washed three times with 0.1% Tween PBS (5 min each) and three times with PBS (5 min each) before development with ECL (GE Healthcare Ltd, Little Chalfont, Buckinghamshire).

Comparative Analysis of Human RA Serum and scFv Binding to CII by Western Blotting

1-11E binds several CII fragments between 50 and 150 kDa as well as to a band >250 kDa which resulted from CII cross linking due to the ROS reactivity (FIG. 2 lane 2-5). 1-11E also binds to native CII corresponding to a band below 150KDa (FIG. 2 lane 1). Binding to native CII in Western blotting was also seen in sera from RA patients that did not bind to native CII in ELISA but only to ROS modified CII in ELISA (for example sera 33 (Nissim A, 2005)).

EXAMPLE 6 Immunohistochemistry of Human OA and RA Cartilage Using Selected Anti-Modified CII scFv

One osteochondral sample was obtained from the femoral condyle of a patient (female, 63 years old) undergoing prosthetic knee replacement for OA. One sample of normal human cartilage was obtained post-mortem from a preserved area of a knee with unicompartimental OA undergoing joint replacement (female, 54 years old). In both cases, cartilage was fixed overnight at 4° C. in 4% paraformaldehyde, decalcified for 15 days in 0.5M EDTA at 4° C., washed in PBS, and embedded in paraffin according to standard protocols. Safranin O staining was performed according to standard protocols (Rosenberg, 1971). All samples were obtained in accordance with institutional policies and regulations.

For immunostaining, 5 mm thick sections were cut, deparaffinized and hydrated according to standard protocols. After endogenous peroxidase quenching in 0.5% hydrogen peroxide for 15 min antigen retrieval was done by 45 min incubation of slides with 3 mg/ml pepsin (Zymed, Chandlers Ford, Hampshire, UK) at 37° C. followed by two washes with PBS. Endogenous avidin activity was blocked using a commercially available kit (Vector Laboratories, Orton Southgate, Peterborough, UK) according to the manufacturer's instructions. This was followed by 30 min blocking with 0.5% BSA. Immunostaining was performed using the selected scFv (10 μg/ml and 1 μg/ml) as well as control commercial mouse anti-CII antibodies (diluted 1:100 and 1:1000 dilution; Chemicon International, Chandlers Ford, Hampshire, UK) and polyclonal anti-CII antibodies (diluted 1:100, 1:1000) from collagen induced arthritis (CIA) mice. ScFv or control antibodies were added to the slide in blocking buffer (0.5% BSA in PBS plus 0.05% sodium azide) and left overnight at 4° C. When scFv were used for probing, next day slides were washed with PBS for 2 minutes and incubated for 30 minutes with anti-myc tag mouse antibodies to bind to the myc tag incorporated at the carboxy terminal end of the scFv (diluted 1:200, Santa Cruz Biotechnology Inc, Wembley, UK). After two washes as above anti-mouse biotinylated antibodies were added (Vector kit PK-6102) followed by two washes with PBS and development with DAB substrate (DAKO, Ely, Cambridgeshire, UK) and nuclear counterstaining with Mayer's haematoxylin. Slides were finally dehydrated and mounted with DPX mount (BDH, London, UK)

Specific Binding to Damaged Human Cartilage Tissue by Anti-ROS-Modified CII scFv

The cartilage extracellular matrix is a complex structure where several molecules interact to form a structural and functional unit. There is therefore the chance that the tertiary and quaternary structure of collagens in the intact tissue may alter the specificity of binding of the phage antibodies that had been selected in vitro. To determine binding specificity in the intact tissue, the capacity of anti-ROS-modified CII scFv to bind to CII within the matrix complex structure and to present immunoreactivity with damaged OA cartilage as opposed to normal cartilage was tested. 1-11E stained the extracellular matrix of cartilage tissue that displayed marked features of OA (FIG. 3A, 3B) with mostly pericellular staining (FIG. 3B), with severe damage of the extracellular matrix determined with reduced staining with safranin O (FIG. 3C). No staining by scFv 1-11E was detected when using histologically normal cartilage from normal cartilage (FIG. 3D, 3E). By contrast, polyclonal antibodies from CIA mice bound the OA cartilage in both the damaged and non-damaged regions strongly (FIG. 3F) and weakly stained with safranin O (FIG. 3C). A commercial anti-CII mAb did not stain the damaged cartilage areas stained by 1-11E on an adjacent section (FIG. 3G) but intensely stained a histologically normal cartilage (FIG. 3H), suggesting that the epitope recognised by the commercial antibody is lost in the OA section.

FIG. 6 also shows staining of OA cartilage. Although synovial inflammation in OA is not as extensive as in RA and inflammatory cells are not significant in numbers, low grade synovitis is nearly a constant feature in OA. Abnormal mechanical force appears to stimulate chrondocytes to produce some of the same inflammatory mediators and ROS as the infiltrating leukocytes present in inflamed RA joints, leading to post-translational modifications of CII in OA. FIG. 6 confirms the results shown in FIGS. 3A, 3B, 3C, 3D, 3E, 3F, 3G, and 3H and shows that staining of OA cartilage section is only pericellular, around the chrondocytes.

A further sample was obtained from a patient (female, 47 years old) undergoing total right knee replacement for RA. Fixing and staining protocols were as described above.

FIG. 7 shows staining of the RA cartilage. In RA, infiltrating inflammatory cells consume increased amounts of oxygen, resulting in the generation of reactive oxygen species (ROS), which may cause excessive degradation of the extracellular matrix leading to cartilage destruction and chemical post-translational modification of CII by ROS. FIG. 7 shows uniteral staining of RA cartilage across the section. This is due to the high influx of immune cells that produce high levels of ROS.

EXAMPLE 7 Construction and Expression of Diabody

Out of the unique scFv assessed for specific binding to modified CII as well as best expression in bacteria, the most promising scFv, 1-11E of 25 kDa, was engineered to a larger fragment of 55 KDa. The linker between the V_(H) and V_(L) was shortened by digesting the phagemid vector with XhoI and SalI and relegation. This results in bivalent diabody, a superior molecule with an increased half life (Hudson, 2005) built from two scFv. Expression and screening of diabody binders was done as above. Molecular weight profile of the resulted expressed diabody was analyzed by gel filtration.

EXAMPLE 8 Inducing Arthritis in the Animal Models

Male C3H mice (age 17-19 weeks) were used. 100 mg of dessicated non-viable T.B. strain H37RA (Difco 231141) was added to 30 ml of incomplete Freunds adjuvant (IFA, Difco 263910) to form complete Freunds adjuvant (CFA). An equal volume of CFA was added to a 2 mg/ml solution (in PBS) of methylated BSA (mBSA) (Sigma A1009). The mixture was then emulsified on ice using an Ultra-Turrax T25 homogeniser at 13500-20500 rpm until a fluffy milky consistency was obtained. Mice were anaesthetised with Hypnorm, and 100 μl of 1 mg/ml (i.e. 100 μg) mBSA in CFA was injected over 2-3 separate sites intradermally. 1 week later, the immunisation was repeated as previously, except that no bacteria were added (i.e. IFA/mBSA). Two weeks after the 2nd immunisation, mice were anaesthetised with nitrous/oxygen and halothane, and inflammation was induced by injecting 50 μl of 1 mg/ml (i.e. 50 μg) mBSA in PBS into the animals' left hind paw. As a control, 50 μl PBS was injected into the right hind paw. Inflammation was measured using callipers to measure the paw thickness. Swelling was seen only in the right paws from 24 hours, and persisted until 1 week later. 2 weeks later, the swelling had totally subsided.

EXAMPLE 9 Imaging of Anti-ROS Modified CII Localization

50 μg of 1-11E diabody was radiolabelled with 20 MBq of sodium [I-125] iodide (GE Healthcare, Amersham, UK) using the iodogen method (Perbio Science, Cramlingham, UK) and diluted in PBS to a final volume of 240 μl. Radiochemical purity was determined by thin-layer chromatography on silica gel (ITLC, Pall Corporation, Portsmouth, UK) using 85% methanol as mobile phase. A volume of 100 μl of the labeled diabody was injected intravenously via the tail vein into two arthritis-bearing C3H mice 24 hours after injection of the mBSA. Four and 22 hours later the mice were anaesthetized by ip injection of Ketamine/Xylazine. The mice were imaged on a NanoSPECT/CT scanner (Bioscan Inc, Washington, USA) using a four-detector/36×1.4 mm pinhole configuration. 30-50,000 counts were acquired for the SPECT study over 20-50 minutes.

Imaging of 1-11E Localisation into the Inflamed Paw

SPECT and CT images from the NanoSPECT/CT camera were fused and displayed using PMOD software. FIG. 4 shows a representative image acquired 22 hours after injection of the radiotracer. Increased uptake of radioactivity is clearly seen in the rear left (inflamed) paw relative to the right (normal paw).

EXAMPLE 10 Staining of Cartilage in Mouse RA Model

Staining of cartilage was observed in the mouse mBSA model described in Example 8 above, except that C57BL mice were used.

Mice were sensitized with mBSA (100 μg) in CFA intradermally at the base of the tail, and challenged either intra-articularly (both knees) or intra-plantarly (right, saline left) with 500 μg mBSA in saline 14 days later.

Staining of cartilage is shown in FIGS. 8A, 8B, 8C, 8D, and 8E.

Paw:

12 hours post challenge with mBSA, the right paw was grossly inflamed in the subplantar region (seen by haematoxylin and eosin (H&E) staining), as shown in FIGS. 8A and 8B. The cartilage in the mBSA paws is uniformly and strongly stained by 1-11E, as shown in FIGS. 8C and 8D. The left paw injected by saline had no subplantar inflammation. Some cartilage within the left paw joints was stained heterogeneously, perhaps associated with spontaneous osteoarthritis.

EXAMPLE 11 Staining of Joint in Mouse OA Model

Staining was observed in mice with joint surface injury.

Seven week old C57BL/6 male mice were utilized for these experiments (Dell'Accio F et al, Arthritis Res Ther. 2006; 8(5):R139). The mice were anesthetized and subjected to medial para-patellar arthrotomy. The patellar groove was exposed by lateral patellar dislocation. A longitudinal full thickness injury was made in the patellar groove using a custom made device in which the length of a 26G needle was limited by a glass bead (injured knee). The patellar dislocation was then reduced and the joint capsule and the skin sutured in separate layers. The animals were killed after 4 weeks and the knees dissected for histological and histochemical analysis.

Staining methods are as set out in Example 6 above, except that rabbit anti-myc followed by anti-rabbit-HRP were used to avoid cross-reactivity with mouse antibody in the tissue.

As shown in FIG. 9, there is strong staining at the site of the injury.

EXAMPLE 12 Production of Fusion Proteins: 1-11E with Anti-Inflammatory Cytokines

Cloning of IFN-beta/1-11E

pFastBac1.AH was created from pFastBac1 (Invitrogen) by cutting out BamHI/HindIII fragment containing multiple cloning sites (MCS), and replacing with a linker to give another MCS of BamHI-KpnI-HindIII-ApaI.

Mouse interferon b (mIFNb) was cloned into the HindIII-EcoRI sites, followed by a MMP cleavage site and 1-11E which were cloned into the NotI and ApaI sites as shown in FIG. 10A. The MMP cleavage site can be cleaved by MPP-1 and MMP-3.

Mouse interferon-beta was amplified with the following primers:

forward: mIFNBHindFOR (SEQ ID NO: 129) 5′ gct aag ctt atg aac aac agg tgg atT 3′    HindIII     Start                 * reverse: mIFNBEcoRIREV (SEQ ID NO: 130) 5′ CGC GAA TTC GTT TTG GAA GTT TCT GGT 3′

1-11E was amplified with the following primers:

forward: NotI1-11Efor: (SEQ ID NO: 131) 5′cag GC GGC CGC a ATG GCC GAG GTG CAG CTG 3′       NotI       * Start reverse: 1-11EApaRev (SEQ ID NO: 132) 5′CTTGGGCCCTCAATGGTGGTGGTGATGGTGTCTAGACCGTTTGATTT CCACCTT 3′

1-11E was amplified with NotI/ApaI ends to include a histidine (His) tag and then cloned into FastBac1.AH mIFN-b/MMP/SP/His and cut with Not/Apa to liberate SP/His.

The mIFN-beta/His construct was cloned by amplifying mIFN-b with HindIII/ApaI with the following primers:

forward (this primer is the same as the primer used for cloning IFN-b/MMP/1-11E/His): (SEQ ID NO: 129) mIFNBHindFOR 5′ gct aag ctt atg aac aac agg tgg atT 3′                HindIII     Start                 * reverse primer: (SEQ ID NO: 133) mIFN-bApaRev 5′ CTTGGGCCCTCAATGGTGGTGGTGATGGTGTCTAGAGTTTTGGAAGTTTCT GGT 3′

These constructs were transformed into DH10Bac cells from Invitrogen and the sequence was confirmed as follows:

IFN-beta/MMP/1-11E/His (50.4 kDa) (SEQ ID NO: 134) MNNRWILHAAFLLCFSTTALSINYKQLQLQERTNIRKCQELLEQLNGKIN 50 LTYRADFKIPMEMTEKMQKSYTAFAIQEMLQNVFLVFRNNFSSTGWNETI 100 VVRLLDELHQQTVFLKTVLEEKQEERLTWEMSSTALHLKSYYWRVQRYLK 150 LMKYNSYAWMVVRAEIFRNFLIIRRLTRNFQNEFGGGGSPLGLWAGGGSA 200 AAMAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLE 250 WVSSIDDSGATTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYC 300 AKNYSSFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSAS 350 VGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYYASSLQSGVPSRFSG 400 SGSGTDFTLTISSLQPEDFATYYCQQAANYPTTFGQGTKVEIKRDIHHHH 450 HH*

Within this sequence, the IFN-beta portion is from amino acids 1 to 182 as follows:

(SEQ ID NO: 135) MNNRWILHAAFLLCFSTTALSINYKQLQLQERTNIRKCQELLEQLNGKIN 50 LTYRADFKIPMEMTEKMQKSYTAFAIQEMLQNVFLVFRNNFSSTGWNETI 100 VVRLLDELHQQTVFLKTVLEEKQEERLTWEMSSTALHLKSYYWRVQRYLK 150 LMKYNSYAWMVVRAEIFRNFLIIRRLTRNFQN

The MMP linker portion is from amino acids 183 to 202 as follows:

EFGGGGSPLGLWAGGGSA 200 AA (SEQ ID NO: 136)

The 1-11E portion is from amino acids 203 to 446 as follows:

(SEQ ID NO: 137) MAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLE 250 WVSSIDDSGATTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYC 300 AKNYSSFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSAS 350 VGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYYASSLQSGVPSRFSG 400 SGSGTDFTLTISSLQPEDFATYYCQQAANYPTTFGQGTKVEIKRDI

The His tag is from amino acids 448 to 502 as follows:

(SEQ ID NO: 138) HHHH 450 HH* IFN-beta/His (23.2 kDa) (SEQ ID NO: 139) MNNRWILHAAFLLCFSTTALSINYKQLQLQERTNIRKCQELLEQLNGKIN 50 LTYRADFKIPMEMTEKMQKSYTAFAIQEMLQNVFLVFRNNFSSTGWNETI 100 VVRLLDELHQQTVFLKTVLEEKQEERLTWEMSSTALHLKSYYWRVQRYLK 150 LMKYNSYAWMVVRAEIFRNFLIIRRLTRNFQNDIHHHHHH*

Within this sequence, the IFN-beta portion is from amino acids 1 to 184 as follows:

(SEQ ID NO: 140) MNNRWILHAAFLLCFSTTALSINYKQLQLQERTNIRKCQELLEQLNGKIN 50 LTYRADFKIPMEMTEKMQKSYTAFAIQEMLQNVFLVFRNNFSSTGWNETI 100 VVRLLDELHQQTVFLKTVLEEKQEERLTWEMSSTALHLKSYYWRVQRYLK 150 LMKYNSYAWMVVRAEIFRNFLIIRRLTRNFQNDI

The His tag is from amino acids 185 to 190 as follows:

HHHHHH* (SEQ ID NO: 138)

The protocol for expression of the constructs is shown in FIG. 11.

Briefly, the constructs were transformed into competent DH10Bac cells (Invitrogen) to generate bacmid vectors. Recombinant bacmid vectors were confirmed by blue-white screening and PCR according to Invitrogen instructions. Bacmid DNA was transfected into Sf9 insect cells using cellfectin according to Invitrogen instructions.

Baculovirus (P1) was harvested from the supernatant of transfected cells, and used to infect fresh Sf9 cells to amplify the virus stocks. P3 virus was used to infect High 5 insect cells for 72 hours, and the supernatant was collected and run on an SDS-PAGE gel. Recombinant proteins were detected by Western blot using anti-tetra-His antibody (Qiagen) and anti-mouse HRP (Sigma).

The test expression of the fusion constructs is shown in FIG. 12.

Fusion Proteins: 1-11E/C7 with TNFR2-Fc

Cloning of TNFR2-Fc/1-11E and TNFR2-Fc/C7

pFastBac1.AH was created from pFastBac1 (Invitrogen) by cutting out BamHI/HindIII fragment containing multiple cloning sites (MCS), and replacing with a linker to give another MCS of BamHI-KpnI-HindIII-ApaI.

TNFR2Fc was cloned into the HindIII-EcoRI sites, followed by a MMP cleavage site and scFv (1-11E or C7) which were cloned into the NotI and ApaI sites as shown in FIG. 10B.

Mouse TNFR2-Fc was amplified with the following primers:

forward primer: (SEQ ID NO: 141) 5′ GCT aag ctt ATG GCG CCC GCC GCC CTC 3′ reverse primer: (SEQ ID NO: 142) 5′ CTTGAATTCTTTACCCAGAGACCGGGA 3′ 1-11E was amplified with the same primers as above for the INFb.

The sequence of TNFR2Fc/MMP/1-11E is as follows:

(SEQ ID NO: 143) MAPAALWVALVFELQLWATGHTVPAQVVLTPYKPEPGYECQISQEYYDRK AQMCCAKCPPGQYVKHFCNKTSDTVCADCEASMYTQVWNQFRTCLSCSSS CTTDQVEIRACTKQQNRVCACEAGRYCALKTHSGSCRQCMRLSKCGPGFG VASSRAPNGNVLCKACAPGTFSDTTSSTDVCRPHRICSILAIPGNASTDA VCAPESDGSPPLKECPPCAAPDLLGGPSVFIFPPKIKDVLMISLSPMVTC VVVDVSEDDPDVQISWFVNNVEVHTAQTQTHREDYNSTLRVVSALPIQHQ DWMSGKEFKCKVNNRALPSPIEKTISKPRGPVRAPQVYVLPPPAEEMTKK EFSLTCMITGFLPAEIAVDWTSNGRTEQNYKNTATVLDSDGSYFMYSKLR VQKSTWERGSLFACSVVHEGLHNHLTTKTISRSLGK---EFGGGGSPLGL WAGGGSAAA---MAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSW VRQAPGKGLEWVSSIDDSGATTYYADSVKGRFTISRDNSKNTLYLQMNSL RAEDTAVYYCAKNYSSFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQM TQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYYASSL QSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQAANYPTTFGQGTKV EIKRDIHHHHHH

Of this sequence, the TNFR2Fc portion is as follows:

(SEQ ID NO: 144) MAPAALWVALVFELQLWATGHTVPAQVVLTPYKPEPGYECQISQEYYDRK 50 AQMCCAKCPPGQYVKHFCNKTSDTVCADCEASMYTQVWNQFRTCLSCSSS 100 CTTDQVEIRACTKQQNRVCACEAGRYCALKTHSGSCRQCMRLSKCGPGFG 150 VASSRAPNGNVLCKACAPGTFSDTTSSTDVCRPHRICSILAIPGNASTDA 200 VCAPESDGSPPLKECPPCAAPDLLGGPSVFIFPPKIKDVLMISLSPMVTC 250 VVVDVSEDDPDVQISWFVNNVEVHTAQTQTHREDYNSTLRVVSALPIQHQ 300 DWMSGKEFKCKVNNRALPSPIEKTISKPRGPVRAPQVYVLPPPAEEMTKK 350 EFSLTCMITGFLPAEIAVDWTSNGRTEQNYKNTATVLDSDGSYFMYSKLR 400 VQKSTWERGSLFACSVVHEGLHNHLTTKTISRSLGK*

The MMP linker portion is as follows:

EFGGGGSPLGLWAGGGSAAA (SEQ ID NO. 145)

The 1-11E portion is as follows:

(SEQ ID NO: 146) MAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLE WVSSIDDSGATTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYC AKNYSSFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSAS VGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYYASSLQSGVPSRFSG SGSGTDFTLTISSLQPEDFATYYCQQAANYPTTFGQGTKVEIKRDI

The His tag is as follows:

HHHHHH* (SEQ ID NO: 138)

As a negative control a non specific scFv was developed that binds to Hen Egg Lysosyme (HEL). Clone C7 was the best expressed and was taken forward for TNFR2Fc fusion as done for 1-11E.

Sequence of TNFR2Fc/MMP/C7:

(SEQ ID NO: 147) MAPAALWVALVFELQLWATGHTVPAQVVLTPYKPEPGYECQISQEYYDRK AQMCCAKCPPGQYVKHFCNKTSDTVCADCEASMYTQVWNQFRTCLSCSSS CTTDQVEIRACTKQQNRVCACEAGRYCALKTHSGSCRQCMRLSKCGPGFG VASSRAPNGNVLCKACAPGTFSDTTSSTDVCRPHRICSILAIPGNASTDA VCAPESDGSPPLKECPPCAAPDLLGGPSVFIFPPKIKDVLMISLSPMVTC VVVDVSEDDPDVQISWFVNNVEVHTAQTQTHREDYNSTLRVVSALPIQHQ DWMSGKEFKCKVNNRALPSPIEKTISKPRGPVRAPQVYVLPPPAEEMTKK EFSLTCMITGFLPAEIAVDWTSNGRTEQNYKNTATVLDSDGSYFMYSKLR VQKSTWERGSLFACSVVHEGLHNHLTTKTISRSLGKEFGGGGSPLGLWAG GGSAAAMAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPG KGLEWVSTISYAGASTAYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTA VYYCAKTSTSFDYWGQGTLVTVSTDIQMTQSPSSLSASVGDRVTITCRAS QSISSYLNWYQQKPGKAPKLLIYNASYLQSGVPSRFSGSGSGTDFTLTIS SLQPEDFATYYCQQAYAGPYTFGQGTKVEIKRDIHHHHHH*

Of this sequence, the TNFR2Fc portion is as follows:

(SEQ ID NO: 148) MAPAALWVALVFELQLWATGHTVPAQVVLTPYKPEPGYECQISQEYYDRK 50 AQMCCAKCPPGQYVKHFCNKTSDTVCADCEASMYTQVWNQFRTCLSCSSS 100 CTTDQVEIRACTKQQNRVCACEAGRYCALKTHSGSCRQCMRLSKCGPGFG 150 VASSRAPNGNVLCKACAPGTFSDTTSSTDVCRPHRICSILAIPGNASTDA 200 VCAPESDGSPPLKECPPCAAPDLLGGPSVFIFPPKIKDVLMISLSPMVTC 250 VVVDVSEDDPDVQISWFVNNVEVHTAQTQTHREDYNSTLRVVSALPIQHQ 300 DWMSGKEFKCKVNNRALPSPIEKTISKPRGPVRAPQVYVLPPPAEEMTKK 350 EFSLTCMITGFLPAEIAVDWTSNGRTEQNYKNTATVLDSDGSYFMYSKLR 400 VQKSTWERGSLFACSVVHEGLHNHLTTKTISRSLGK*

The MMP linker portion is as follows:

EFGGGGSPLGLWAGGGSAAA (SEQ ID NO: 149)

The C7 portion is as follows:

(SEQ ID NO: 150) MAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWV STISYAGASTAYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAK TSTSFDYWGQGTLVTVSTDIQMTQSPSSLSASVGDRVTITCRASQSISSY LNWYQQKPGKAPKLLIYNASYLQSGVPSRFSGSGSGTDFTLTISSLQPED FATYYCQQAYAGPYTFGQGTKVEIKRDI

The His tag is as follows:

HHHHHH* (SEQ ID NO: 138)

The protocol for expression of the constructs is shown in FIG. 11 and is as described above for the IFN-beta/1-11E fusion protein.

Infected Hi-5 cells were grown for 3 days at 27° C. After 3 days, different 100, 50, 25 and 12 microliter aliquots of cell supernatant were taken for Western blot analysis. Fusion protein was probed with anti-His tag antibodies. As shown in FIGS. 13A, 13B, and 13C the apparent molecular weight of the TNFR2Fc fusion proteins is slightly above 75 kDa which reflects the predicted 50 kDa TNFR2Fc plus 30 kDa scFv. 

1. A composition comprising an antibody or fragment thereof against oxidised Collagen II (CII) in which the antibody or fragment thereof is conjugated to a pharmaceutically active moiety, wherein the antibody or fragment thereof comprises CDR sequences in the Variable Heavy (VH) chains and Variable Light (VL) chains as shown below, wherein the CDRH1 and CDRL1 sequences are the same as those of scFv 1-11E; CDRH2 CDRH3 CDRL2 CDRL3 SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID NO: 45) (SEQ ID NO: 65) (SEQ ID NO: 92) SIASSGTTTYYADSVKG SYADFDY AASNLQS QQADTYPTT (SEQ ID NO: 31) (SEQ ID NO: 54) (SEQ ID NO: 82) (SEQ ID NO: 118) SIDSAGDSTYYADSVKG SYSYFDY TASYLQS QQASDYPTT (SEQ ID NO: 35) (SEQ ID NO: 58) (SEQ ID NO: 85) (SEQ ID NO: 122) SIDTGGSYTDYADSVKG SYTTFDY SASYLQS QQGSNSPTT (SEQ ID NO: 37) (SEQ ID NO: 59) (SEQ ID NO: 75) (SEQ ID NO: 124).


2. A composition as claimed in claim 1, in which the antibody is a polyclonal antibody or a monoclonal antibody.
 3. A composition as claimed in claim 1, in which the antibody fragment is a Fc, Fab, scFv, single domain (dAb) antibody, diabody, minibody, or scFv-Fc fragment.
 4. (canceled)
 5. A composition as claimed in claim 1, in which the antibody is an scFv selected from the group consisting of: 1-12A, 4-6A, 4-8A, 4-9F, 4-4H, 3-3A, 3-6F, 3-9D, 3-11E, 6-11D, 4-5H, 6-5F, and 6-7F.
 6. (canceled)
 7. A composition as claimed in claim 1, in which the composition comprises a proteolytic cleavage site between the antibody or fragment thereof and the pharmaceutically active moiety.
 8. A composition as claimed in claim 7, in which the proteolytic cleavage site is a matrix metalloproteinase (MMP) cleavage site, a serine protease cleavage site, or a site cleavable by a parasitic protease derived from a pathogenic organism.
 9. A composition as claimed in claim 8, in which the proteolytic cleavage site is a MMP cleavage site.
 10. A composition as claimed in claim 9, in which the MMP cleavage site is one or more of MMP1, MMP2, MMP3, MMP7, MMP8, MMP9 or MMP10 as shown in FIG.
 5. 11. A composition as claimed in claim 1, in which the pharmaceutically active moiety is an antibody or a fragment thereof, a growth factor, a differentiation factor, a cytokine molecule, an interferon, a bone morphogenetic protein (BMP); a chemokine, a MCP (Monocyte Chemotactic Protein), a cytokine inhibitor; a cytokine receptor, a free-radical scavenging enzyme or a toxin, or an active fragment or portion thereof.
 12. A composition as claimed in claim 11, in which the pharmaceutically active moiety is an interferon.
 13. A composition as claimed in claim 12, in which the pharmaceutically active moiety is interferon beta (IFN-β).
 14. (canceled)
 15. A composition as claimed in claim 11, in which the pharmaceutically active moiety is a TNF receptor (TNFR) antibody fusion protein.
 16. A composition as claimed in claim 15, in which the pharmaceutically active moiety is TNFR2-Fc.
 17. (canceled)
 18. A composition as claimed in claim 1, in which the pharmaceutically active moiety is a glycosaminoglycan molecule, chondroitin, a non-steroidal anti-inflammatory drug (NSAID), a steroid, sodium hyaluronate or hyaluronic acid, colchicine or hydroxychloroquine.
 19. A composition comprising an antibody or fragment thereof against oxidised Collagen II (CII) and a detectable label, wherein the antibody or fragment thereof comprises CDR sequences in the Variable Heavy (VH) chains and Variable Light (VL) chains as shown below, wherein the CDRH1 and CDRL1 sequences are the same as those of scFv 1-11E; CDRH2 CDRH3 CDRL2 CDRL3 SISNSGTNTDYADSVKG NYASFDY YASYLQS QQGSASPST (SEQ ID NO: 7) (SEQ ID NO: 45) (SEQ ID NO: 65) (SEQ ID NO: 92) SIASSGTTTYYADSVKG SYADFDY AASNLQS QQADTYPTT (SEQ ID NO: 31) (SEQ ID NO: 54) (SEQ ID NO: 82) (SEQ ID NO: 118) SIDSAGDSTYYADSVKG SYSYFDY TASYLQS QQASDYPTT (SEQ ID NO: 35) (SEQ ID NO: 58) (SEQ ID NO: 85) (SEQ ID NO: 122) SIDTGGSYTDYADSVKG SYTTFDY SASYLQS QQGSNSPTT (SEQ ID NO: 37) (SEQ ID NO: 59) (SEQ ID NO: 75) (SEQ ID NO: 124).


20. A composition as claimed in claim 19, in which the detectable label is a radionuclide or a dye.
 21. A composition as claimed in claim 20, in which the detectable label is a dye. 22-23. (canceled)
 24. A method of treatment of an arthropathy, comprising the step of administering to a subject a composition as claimed in claim
 1. 25. (canceled)
 26. A method for the diagnosis of an arthropathy comprising the steps of administering a composition of claim 1 and subsequently detecting the composition. 